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Coal Scuttle. No. 11,898. Pate nted'Nov 7, I854.

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UNITED STATES PATENT OFFICE.

IVILLIAM NELSON MARTIN, OF BRISTOL, RHODE ISLAND.

COAL-HOD.

Specification of Letters Patent No. 11,898, dated November 7, 1854.

To all whom it may concern Be it known that I, \VILLIAM NELSON MARTIN,of the town of Bristol, in the county of Bristol and State of RhodeIsland, have invented a new and useful Improvement upon the commonCoal-Hod, the object of which improvement or invention is to separate,screen, or sift the fine coal, coaldust, or dirt, from the coarse coal,and that by the ordinary jar or motion to which the coal would besubjected in placing it into the hod, and in emptying or discharging ittherefrom; and I do hereby declare that the following is a full andexact description of the construction and operation of the saidimprovement, reference being had tothe annexed drawing, making a part ofthis specifi' cation, and which is intended to represent a longitudinalsection of the coal-hod and also of my improvement thereto.

A, orifice or opening at the top of chamber B for the discharge of coaldust from the hod; B, chamber through which the coal dust passes toorifice A, from receptacle C, after its separation from the coarse coalC, receptacle for the coal dust as it falls from G, the main body orcavity of the hod;-E, chamber for receiving and retaining coal dust thatmay pass from main body of hod G, and from receptacle C while the coarsecoal is being discharged or emptied from the hod at its mouth at J; F,perforated, or grating floor, to admit the passage of the fine coal fromthe body of the hod G, to receptacle C; G, main cavity, or body of thehod;H, upper portion of the inner wall of chamber 6. I, lower portion ofthe inner wall of chamber E, and which is perforated or grating formed,to allow coal dust to pass through it to chamber E, while contents ofthe main body Gr are being emptied; J, point where outer and inner Wallsof chamber E, unite to retain the coal dust and prevent it from beingdislodged from the hod when the coarse coal in the body of the hod isbeing discharged K, partition attached to the inner surface of the outerwall of chamber E, and extend ing laterally across the chamber, anddownward in a slightly curved line into receptacle C to a point a littlelower than the level of floor F, to prevent the coal dust in receptacleC, from being removed into chamber E, while the main body or cavity G isbeing emptied of its contents Z, inner wall of chamber B ;M, partitionseparating space N from receptacle C, to prevent coal dust from lodgingin angle or space N while dislodging coal dust through chamber B, to andout of orifice A; P, lower floor, or bottom of coal hod;R, anterior, orfront outer side of coal rod-S, posterior, or back outer side of coalhod.

I proceed to show the construction and operation of my invention so faras the same has not been already described. I take, or construct a coalhod, in any of its usual forms, although one of an oblong form, as shownby my model is the best adapted to receive my invention or improvement,-and show its advantages. And in order to screen, sift, or separate thefine coal, coal dust or other fine substance not suited or not wellsuited for combustion from the coarse coal, I make two bottoms P, and F,to the hod, one above the other, with a space between them sufficientlydeep, and depending in some measure upon the size of the hod, to receiveall the fine coal, coal dust, or other fine substance that wouldordinarily be mingled with the contents of the hod when filled for use.The upper bottom F, is laterally as wide as the hod, and its side edgesare permanently attached to the sides of the hod. If this bottom F, ismade of sheet iron or other sheet metal, it is perforated over nearlyits whole surface, with holes of any form and size that will admit onlythe fine coal, coal dust or other fine substance to sift or pass throughit to receptacle C. If not made of sheet metal, it may be constructed ofmetallic wire, or rods in the form of a grating. The longitudinaldiameter or extent of this floor F, is less than that of floor P. Theobject of this, is to give room for a communication from receptacle C,with chambers E, and B, which are constructed in the anterior andposterior portions, or sides, of the hod, and which at their lowerextremities open into receptacle C. The use of the chamber E, is toreceive the coal dust from receptacle C, and also any that may passthrough perforations or grating I, when the mouth of the hod at J, isdepressed, to dislodge at that point, for use, the coarse coal from thebody of the hod G. The walls H, and R, uniting at J, close the chamberE, at its upper extremity, so that the coal dust cannot again minglewith the coarse coal, or pass out of the hod at that point. When the hodis again set upon its base P, the coal dust in E, falls back by its ownWeight into receptacle C. The semipartition K, is united at its top andside edges only, with the inside of the outer front and side walls ofthe hod in chamber E. Its use is to prevent the greatportion of the coaldust in C, from passing into E, when the mouth of the hod J, isdepressed. To accomplish this, and also to admit any coal dust in E, tofall into C, its lower edge does not unite with floor F but descends alittle lower into receptacle The use of orifice A, chamber B, andpartition M, are as follows: When the receptacle C, is full of coal dustor fine coal, and requires to be emptied, the posterior portion of thehod is depressed at the point A, so as to allow the coal dust to fallfrom receptacle C, int0 chamber B, and from thence out at orifice A. Andpartition M, closing up the space N, is to prevent the coal dust fromfalling back into and lodging in space or angle N. No definitedimensions can be given to chambers B, and E, as their size will varywith the size of the hod. These chambers do not encircle the whole ofthe inside of the outer wall of the hod, but

occupy a section only of its anterior and posterior sides.

I disclaim the invention of the common coal hod.

lVhat I claim as my invention and desire to secure by Letters Patent, is

Separating the main central chamber of a coal hod, or bucket, fro-m theouter sides and bottom of the same, by an interior lining of sheetmetal, partially perforated, or of sheet metal and wire gratingcombined, in such a manner as to form a dust chamber between said liningand the exterior .of the hod or bucket, open at the rear and closed infront, by which the coal only will be discharged at the front side ofthe bucket and the dust be deposited in the said dust chamber; and whenthe coal is all discharged from the bucket, the dust can be removed fromits receptacle therein, by movements the reverse of those required indischarging the coal from its receptacle substantially as herein setforth.

' WILLIAM NELSON MARTIN. Witnesses:

JONATHAN R. BULLOCK, I. HALSEY DE WOLF.

